Show QR image and Download PNG button in QR Codes panel; v1.1.3

Each QR code card now renders a 128px preview of the actual QR image
(pointing to /qr/<slug> on the current origin) and a Download PNG link
that saves it as qr-<label>.png. Uses the qrcode browser build with
@types/qrcode for TypeScript support.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "siteforge",
-  "version": "1.0.14",
+  "version": "1.1.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "siteforge",
-      "version": "1.0.14",
+      "version": "1.1.2",
       "dependencies": {
         "@dnd-kit/core": "^6.3.1",
         "@dnd-kit/sortable": "^10.0.0",
@@ -35,6 +35,7 @@
       "devDependencies": {
         "@eslint/js": "^9.39.4",
         "@types/node": "^24.12.0",
+        "@types/qrcode": "^1.5.6",
         "@types/react": "^19.2.14",
         "@types/react-dom": "^19.2.3",
         "@vitejs/plugin-react": "^6.0.0",
@@ -3433,6 +3434,16 @@
         "undici-types": "~7.16.0"
       }
     },
+    "node_modules/@types/qrcode": {
+      "version": "1.5.6",
+      "resolved": "https://registry.npmjs.org/@types/qrcode/-/qrcode-1.5.6.tgz",
+      "integrity": "sha512-te7NQcV2BOvdj2b1hCAHzAoMNuj65kNBMz0KBaxM6c3VGBOhU0dURQKOtH8CFNI/dsKkwlv32p26qYQTWoB5bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.14",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.14.tgz",